By making a cash donation to The Salvation Army, you are able to claim a charitable deduction of up to 50% of your adjusted gross income in the year you make the gift. If you cannot utilize the entire deduction in that year, deductions may be carried over for an additional five years.
Scientists learn about the layers deep within the Earth's crust by studying how seismic waves travel through the Earth.If there is an earthquake somewhere, seismagraphs in many locations will record it.
We know more about the surface of the sun than the deep earth, says Rich Muller of the Lab's Physics Division, a professor of physics at UC Berkeley. We can probe it by seismography and by looking at heat signatures, and we have the evidence from changes in the magnetic field. But mostly it's a mystery..